Misthreading device for weft-replenshing looms.



J. NORTHROF. MISTHREADING 'H ICE FIOR WEFT REPLENISHING LOONIS. APPL lM1011 mio M11. 14. 1916.

1 1 86,933 Patented J une 13, 1.916. 4 SHEETS-S1121 1.

l. NORTHROP. MISTHREADING DEVICE FOR WEFT REPLENISHING LOOMS.

APPLICATION FILED lAN.14.19\6.

Patented J une 13, 1916.

4 sHEETsAHEErs.

7. Uwjzjfwwpm@ @3849?? 42 Poziow l. 53" /9 f iid (fw @WW l 1. NORTHRUP. MISTHREADING DEVICE `FOR WEFT REPLENISHING LOOMS.

PPUCTION FILED ^N 14. 15H5. 1 1 86,933 Patented June 13, l916.

4 SHEETS-SHEET 4.

UNTED STATES PATENT OFFICE.

JONAS NORTHROP, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO HOPEDALE MANU FACTURING COMPANY, 0F MILFORD, MASSACHUSETTS, A. CORPORATION OF MASSA- CHUSETTS.

MISTHREADING DEVICE FOR WEFT-REPLENISHING LOOMS.

Specication of Letters Patent: Patented J une, 13, 1916.

Application filed January 14, 19416;Y Serial No. 72,119.

To all whom t may concern.'

Be it known that I, JONAS NoRTHnor, a citizen of the United States, residing at Hopedale, in the county of Worcester and Stifte of Massachusetts, have invented certain new and useful Improvements in Mislhreading Devices for Weft-ilcplenishing Looms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such es will enable others skilled in the crt to which it uppertains to make end use the same.

The present invention relates. to an irnprovement in misthreuding devices for automatic weft replcnishing looms.

Automatic weft replenishing looms 'as ordinarily constructed are provided at one side of the loom with weft roplenishing mechanism and on the opposite side of the loom with wett or filling detectingr mechanism. TFi/"hen the lilling in the active shuttle becomes exhausted or broken, absence of filling is indicated by the detecting mechanism on the next detecting heilt of the lay, and on the following or non-detecting beat of the lay e fresh supply 0f filling is inserted into the shuttle. Should the filling break during its insertion into the shuttle, there occurs what is technically known as u hopper misthread, and on the first shot of the shuttle away from the weft replenishvingr mechanism no filling is laid in the shed.

Should severalv hopper misthreads voccur in succession they would greatly impair the quality of the cloth Woven.' Three successive hopper misthreads, however, do not impair the qunlity of ordinary cloth.

It during the operation of the weft replenishing mechanism the fillingr thread should `fail to enter the shuttle eye there occurs What is technically known as a real misthread, and on the first shot of the shuttle away from the weft replenishing side of the loom an intact filling is laid in the shed, so that on the next detectingbcat of the lay filling presence is indicated by the detecting mechanism. On the return shot of the shuttle to the weft replenishin'g side of the loom the filling breaks, but lling presence having been indicatedA onthe preceding,T detecting'beat the weft eplenlshingH mechanism is not-"set iny operationfand the 'shuttle with its broken thread is picked to the detecting side ot the loom and is again returned to the weft replenishing side of the loom before a fresh supply of filling is inserted into the shuttle. It is obvious, therefore, that the occurrence of a single real misthread impairs the quality of the cloth` Woven more seriously than the occurrence of single hopper misthread.

It has been proposed heretofore t provide looms Withmisthreading devices opersting tol cause 13ml) stoppage on the occurrence of three successive hopper misthreads and also on the occurrene'eoftesingle real misthread, but these devices have what complicated in construction.

The object of the present invention, therefore, is to produce a misthreadinp'I device of improved and simplified construction which will operate with certainty to cause loom stoppage on the occurrence of three successive hopper niisthreads, on the occurrence of. a single real xnisthread, and on the occurrence of a real. xnisthread preceded either by a single or by a double hopper misthread.

fTo the accomplishment of this object and further objects which Will hereinafter appear the invention consists in the misthreading device described in the following specification and particularly pointed out in the appended claims. i

In the accompanyingdrawings illustratin,gr the preferred form of the invention; Figure 1 is a plan of a part of the left-hand end of e loom showing' the application of the improved misthreadjn'g,Y device thereto; Fig. 2 is a side elevation partly in section,

tion of the niistlircadmg device on the occurreneego one real inisthread; and Fig. S

illustrates the operation of the misthread- ,ing device when neither a real nor a hopper 'mlsthread occurs during the insertion of a been somei rinbodinn'ent ci. iii@ invcnfion may ply of iiiling into clic act-ive shui:- ring filling exhaustion or breakage during normal weaving.

The loom to ivliicli the improved mistlirezn'ling dov'ce attached and of which the loft lmnd cnris slioivn in the illustrated of :my nsnnl or prcfi'frred forni, The parts of the loom illustrated comprise a brenst beam 10 linvirff :i shipper slot, Vil provided with a recess i in wliii-li is received the shipper 1S flaring: rise rin fz of the loom. fr knock4 ofiT ici-:cr lll is pimofrlly support-cd upon :ibrzirl l secured to the breast bezim and the shipper 1.3 The filling or dod ccior fork lil is pivotnlly supported upon detector slide 17 which rcciprocates forwardly and bnclfwnrdly in tho slide stuw porting b Holzer l2 .vliicli is secured to@ e brezifst benin. 'lflzc loiwvfird cnil of 'the slide l? is provided willi a boss 19 which engages the upper end of the detector arm 2O mounted on :a rock ,snuit 2l which extends acros the iront sido oi" lin? loom and is connecieiii n the other @nfl of tl 1,- loom with the weft replcnisliing n l m. The weft han mor Q3 recipr nies forwardly and backsvmilly (oncc evorv vfo forward of the lnyl under ilse; oil of the detector fori; 1G. and olwn 'ab if: detector fork 'le do pi. Ted upon wnncc the weft inimmer bool; 2:3 which i Ovid-ed with :i barb 26 engages the ruil linnfl pushes the slide l? forward, tirera-by 'iisciflating the detector :irfn 2'() :and lic rovi( shaft 2i, io sot in operation the weit replenishing imechanism. The 'r'letccor firm 'J0 and the rock shaftr 2l constitute wlmi: is; known :is be filling si1pply rnmtrolling means. If on a detecting beat laire! filling; presence the detector fork if tilted :and licn the forward 'reciproontion of thc wc fr, lmnnner is not communicated to the .slid :ind consequently the wcft; replcnisliing mecnnnism is not sotin operaition. The paris desirilscd above const-iteie lin: filling diecring inrclmnism and the fill ing `supply c-irfrolling' means and these pia iieir actmring mechanism and mode oi: o gifergilion. i frllifcrl With other parts of cliff loorn new` ry to :i disclosure of the prosenvv "iivenlion are ivclllinown to those skilled in the arl.

'lilic improved rnistiircading device is a rontrivance operating lio cruise loom stoppa upon the occurrence of three successivo hopper mistlirr-nds, upon the occurrence of a single rcnl mis-thread alone and upon the fiiornrrencc of :i reni mistliread following cilrer n. single or a. double/hopper mis thread. This cont'ivnnce comprises a knock-olf lever curator 28, e stop delaying device or controller 29, :reid a resciing block `or rcsctter 30. The lmocl, olf lever actuator operates when lic prmlctormined 'number of requisite kinds of nimirerrds have occurred,

io engage :'flio knock-oil lcvvr :ind fori-e it 'nmard` rlicrclrr releasing the shipper from its holding noofli to slop the loom. The knocloll levcr :iriintor mounted on n pivot pin it? journziled in cnrs and ll projecting' upwardly from ilic dccrtor slide l?. The illfirirnrd 0nd or liczid 35 of the linoul-ooll lever :actuator is heavier than the rear end or tail 3G. so rlmt Ythc licnd' of the actuator lends constantly to dcsrend into operativo posirion lioiiind the l r1orfl -oll`le ver, 'lln liend of lic :zffl'nntor is provented from :resuming its operative position bcliind the knock-oil lever, until the proper times, by l'lilo ongzigcn'ient of n controller lng 38 with ccrnin portions of the controller The *op delaying device or cont-roller 2D es to prevcil: the knocloo lever actor from c using" loom .stoppage until predecrniined mnnlicr of nc-li kind of i rlirczid .ir s occurred, The controller is ivliccldile in simpa und is provided with a lull liv projmving sind or axle 39. Tlie controller is mounted on its axle 39 for pivotal :nid voricnl movements in an elongated slot 4U formed in :in ni'iriglit. 4l rising from rbc forward ond of the detector slide 17. 'Vily slot 'permits tile' lifting of the con- .er b v'ilie knock-oil lover when the lz1ttor posse-s nndcr the former. The forward side ol' the stop delaying device or con- -rcllcr provided with a scries of rackv teeth. i2, l :ind 4f?, which are adapted t0 be engaged on forwnrd movements of the detector slide, b v the knock-ofi' lever to impart :i progressive or clockwise movement to the controller'. The rearward side of the controller is provided with a series of stop ifontrolling notches, iwo deep notches 47 und i3, and two relatively shallow notches 4f. :rnd 50. When because of certain c0nditions obtaining during the operation of the loom thc controller lug 38 is received in either of the deep notches 47 or 48, the lmoclnolf lever actuator will assumo its op creativa position behind the knock-oli lever; lum when because of certain other conclitions obtaining during the operation of the loom lie lng 3S is received in either of the slr/allem' notches 9 and 50? the knockof lever zicinzitor is held above and clear of tho knock-oil' lever.

Tho resorting' block or roscttcr 30 is secured to the end of the axle sind 3f) which projects beyond one side. of the upright 41, and itiogfunction is to reset or restore the controllcito is no1-:nal position, The reseti tenis in'flic 'forni of nn .firm and extends f ir nnrciockwise or wiwi-nt zo lle sop delaying so' izilnnccd that ii tendsv of yf{introiti-r. The lotrogfimh or ofhwiw moronwn ot the Qontrolior is :fonti-ii h): tho npngonlrnt of thv hij; fr?, n ith tho ivm sido of ihrmw or' tho upright il. lim inouro or uloaliwibo niowocnt lw is linlitmi h i' tho lining own( o, .i heg* .fl oxtcniiinff lzitornillv troni. th.l rontrolur with tho fronty mh* ot' the ilpiigfh 2l. 'Hw ongugonlont ol" tho lng .32% with the' iront hhhof thv upright AllV gmxrffhts thi' i'owtingj hloih or iosrior from owrhroo'ii f uit from uswnniing: n po- ;itfon troni which it winnot he rvtnrnml lo' toros oll grzii'ity.

During normal ogwrntion ot" thv loom`r tho parts ot tho nistllreniliin,r Iorive aro positionoil :n xhown in Fig'. 2. with tho ifontrollor lo;A d @sting in :i shnilow rtfuss l2 oppor .ani-faro ot thor von lil.

irmtion of the migthrratling' hwiotfon Lw omfirri'noo of three Sncoessire hopper inisthromls is illustrated in Fig. b. It is :is innm that' during they normal operation ol' tin moin ihn. filling hrmlaw or heroins 0X- huiwoii mi thsi` on tho nf-xtj detecting hout,

iii vi-iion ot n t'rosh supply of filing in iif inrinp; tho normal Opf-ration io" t ian'li tooth 43 is 1n lowervd tho lfnoirlvoff lever l, and nimh the fom.- rd inox/@munt of the detector al ih ihr* mmf-' tooth -tl engi: the lmocl oil' Error. :w Shown in position vl of Fig'. :imi www@ thv vontrolhr 2i) to torn clockwise thv fw roller lng; 'fi i5 roffrfivml into fmlovniitvh if?. Tho oroiision. of firstfnvo .'ilwnys irsnitls in tho vonlso' 5;; tinmffiorl'ml, from tho if* ioih 'i-Bl. i

:e 1i l?. o tho ll trom ll porinim tho fioritaoihfi to ,t wwf nini ihn. .with im zh il to nrnmo :i www@ pfmtion hohinii tim hinwfh-otl i0\' r, m khoon in position The oonti'olior lng lor-@wrom roinninn in thel notrh l?. lt, now :immuni lmtv hiring thv oporiition ot thio'i-tt, rtjilrnishing morhunirin i; hopper ini-ilirmsl ownrroo'. that it io sur. tin till.- i: ihirnti im# hrohon hiring the` tritnrefer [ho new hohhin hito tho hnttlv. :no that,A on thit .finit @hot oi' thi.l shnltlr to thc intoetimgj Ghz o' thilooin. no tiiiing is lsiiil in tho hvil ,simi w hi non lhtiiftihg limit tiiling;

o is ienlirzitril. This tillin,"r fihsinro n Promi forvvzu'il mornmit ot' tho ihtrctor slithf :ind the ongugmnont of the i-:irk tooth "H with tho knock-off .inver let, which rosnhs in cho turning 0l' the contrnll'n" nntil the Controller lng 38 is r ,zeivied in the notch 50, as shown in position 3. l'gmn tho rotnrn of thc detector slide, the ihfiongngoniont of the lmork-otf lever from tho mot; tooth ll permits thvy ruck tooth l5 to :assumo ii lowered pobition behind tho irwohml? hwor. :is Shown in position l, tho rontrollor lng 3S ronmining in the noti-n 5U. "Ihr forward moromont of thv iietoctox sliil t7 rwnhinn' from thi. hopiiur inist/hrend. set. in operation 'lnx weft rcphenishing mechanism. um.' n is npposwl 'that during the trnntlr ot` they fresh Supply of filling into tho shntthf. :1 sorond hopper inisthrvnd 0C- vnrrml. so thnA` on thil nixt Succeeding lelooting' limit tillingf nhsonrfo iS indicated by tho dom-tor 'forli unil :l third forward movenn'nt olt the tctwtor .while takt-s place. This thiwi forward mormnvnt. of the detector slidihrings the mol( tooth into engaigrini-nt, with this knociol lvvci .lil and turns thv iontrollrr until tho ffoxitriiller lng is iwi-imi in thor month of the deep notvh lo, :is ho\\fn in gioblition ly this time, th honi $3.3 of." tho linorlvoti' lever actuator 2? h f1 hwn lmrvifml nnti it rvs-oi on the lmochlowr. tin th" rvtnrn of the dotoctior h. thv fii, sm., v.*.hnnnty of the knock-bfi over from the nich tooth 45 und thv Immer' .wir otI the hvini ot' tho nfftiniator, permits the urtnntoi to drop imo operative pofiition ho hind the .lmorloot hvor, .s shown in poni ion t?. Tho riff, *tion ofi. tilio fontrollm lng.;r SFS into tho ihk-p notch 4H dotm'tniiws the opomitir@ hosition of the lmfcloff lover antw toi' lwhimi thevv knock-ntf lever on the ooclnrieni-o of two successivo hoppor mis? thromls. 1t now #supposed that. during the opontiioz'l of the woft replenishing mechaniiin zwemt h :f'itlm thir=l forwziiil moremom of this fiotoctoi- Stille. resulting' troni thu imlicntiola ofi filling erlisni'zo on tht Second hopper inistiniml. :i third hopper misthrimd ooriirron: fiiiing nhnonoo i# tl'im'eikiro indi (viti-il on the nfxt thitorting boat. und the fletoitor slide 17 iS niowil forward :1 fourth timo. Thibl fourth norm-@Hirn forward moronwnt ot' thv lotwtm Shih: brings the forward foil ot the heini ot the lcnouh-otl' levcr notwntor into onggngonwnt. witn the lmoolnoll' lovor. und tho continui-d forward nmvonlent ot' the :ntnntor forros the kn0ck-off hror tornai-ii. :is shown in position (i, until the rshippvr lover ll is disengaged from the notvh l2. :mii thoy loom is Stopped.

'l'lw oporntion of the n'listhrending device on the orcnrronoe of one real misthreatl is iilutmtml in Vig. It is assumed that, during thv normal operation of the 10mn, thor@ `is hrmxlmgo or exhaustion of filling. The indication of filling absence on the next dotwting heat risnltfs in the forward move,- xnfnt o' the detector slide 17 and the actul li) .4C meffmw allfsreqmmf. indi tion nf filling@r pw' ille, mnt Szwmeflmg or 'mul fletes Deut iso cgi

Menem;

position 3 of Fig. 7; and :is described, the return of the wett lnininiei lli will leave the parts of the inisthi'eiiding devine in; :shown in position fi ol' Fig. 7. The oeriirrinee ot the rzil iiiistliieiid rosnlts in thiL indication of tilling :dist-neo on the next sliirniding or iiftli detecting heilt, the forward niovenioiit of tho detector slide, the engagement of the knock-oil' lover ll lii' the knock-oli' love/r :iv tiiiitoi, :ind the ,stopping ot tho looni.

The operation olf thi niifilireiiding devine. when tho notion ol' tin:l wot't roplenishing mechanism, following ixzhiiilstion or hrt-:ilc- :ige ot filling dining' norniiil running ol) the looin, reiiltzi` in si liropnrly throiided shuttle, is illustrated in Fig. n. The filling absence, and the siihsoipient i'iirwiird :ind return movements of the detoi'ttor slidr 1T result. in the Change of position of the parts of tho niisthreziding device 'from the position shown in Fig. 2 to that shown in pneitions. l :ind 2 of Figs. li, 7, :ind (ln the next or second detecting lient, filling pi'cseneo heing indicated, the weft lnnnnior 23 coming into engagement with the tiil 36 ofi-inutile; the actuator QS to disengiige the oontroll'or lng 38 lroni the notch if). :is Shown in pofiiiioii 3, thereby permitting the controller Qi) to turn roiiiwvzirdly or :intiirloeliwiso The return heut ol' the weit lniinnier .3 peri'nits tho head of the iictinitor to ilesiifend iis shown in position l until tho controller lng is received in thc deep notch 4T. (ln the next succeeding or third deieiting heid, filling presence heilig indicated, the weft lniniinor signin ongnges tho inil Zilli sind oscillation the :ietiiinor 28, si the houd of the :ii'tinitor rises, the diseiigzigi'nnfnt ol the lng 25%.* Ylioin the notrli il' permits thil rontroller to he turned reiiiwwirdljii ln' ihn resettei il() until the shallow renewv l2' ifi in the polli ol donnwzird niorrniint ol ihr lng lin?. in; \hnwn in poSition 5, 'The disrngugeinent ol1 tho welt lininlnei on ito rotin'n limit troni the tail Bn permits the, hond of the :xcliinlor to descend until the lng 38 i-eeeiwd in the renesn 42, aS Shown in position (i, This i; the noiinui position oi the pin-ts ol" ihn :nisthreiiding device and rorrimpoiidy tn the posiition oi' ihn parts Shown in Fig. 2. 'l`h.l limit filling presence occurring :il'tei' ii filling :ihonre which has heen winded. either hy lilling oxhiiiistion during iioinnil woz/ii ing. oi', liv either ii Singh,x or :i douille hopper n'iishrerid,

i positionn the paris ol the nirsihi'eiiding di vite So that the knock oil liner gii'tiizitor 'in in operative position hehind tin` linoifiboiif lever, iind the Seoi'ind stico siro liiling pref:- eni-e restores; tho parte, ot thi; niistlirofiding devine lo noinfnil pf Tho present invention iwiniffinplntw :i inistlireziding dotierhim ing init-i. x 'for mi.` iiiglooin stoiipii-go, minne: for delaying: or controlling the Stopiiing oi" the looni, that is to siiy, for determining ler 'wind 2on-A ditionS.looni stoppage shall take place, und inezins for aiitoinaticiillji resotting or lesion ing.;- the controlling moans to normal posi lion. The pai-ts ot' tho devine nre mounted on the detertor slide. The means for minsv ing looni stoppage is pivotnliy mounted independently of the stop doliiying mein und instructed to niove longitudinally with the detector slide when lilling .is :disent on :i detecting lient, :ind pivotailly whon lilling is pre-#ent on i detecting heut zitter lilling siheinzo. The means for controlling loom stoppage is mounted for pivotal and vertical, movements and is Constructed for nrtinition in one direction hy engrigenicnt with .wine stationary pzirt ot the looni when filling :disent on :i detecting lient, :ind for :intimtion in the opposite direction hy the reisotter when lilling is present on one or two dctertn ing` honte; following lilling absence". The rontrolling means is provided with ii series of stop rontiolling depressioiris or noti-,lies oi different depths in which is ifeieiillii nienilmr ot' the looin stoppage iniiins, iicord'i ingf to tho ifiinditionz;` oi' looni operation, The :ii'i'iiiiginieni olVA these notches4 :ind the roniitrnrtion of the vontri'illing inrfiinewv :ire suoli. that, when two hopper inisthri'fzids have or onri'ed, tho ooni Htoppngi.- nioiins is in position to winne looin stoppage; so, also, it' nttir i'illinff :ibsienee or after :i single hopper or n donnie hopper inisthi'ciid filling is present on the nextv detecting heut, the looin stop page nieiins i in position to canse looin stoppage. ll', in either mise filling is :disent on the next detecting bezit, the looin will he ntoppnd: lint if in the first ense filling is present on the next two detecting heats, or ii' in the lwcond mise tilling be present on the next detecting heut, the ininthreiiding device will lio iositorod to normal position, The nieiins` for resetting they controllingiiiians in' positiwiy connected therewith :ind ,wo eonsirncted tlnit, when, on the orrzision of one or two filling presencias zitter filling absence, the looin stoppage nieuns is engaged by thil weit, hiiinnior and thereby disengaged l'roin the controlling moans, the reset/tor inipzirts :i retrograde or resetting n'ioienient to thi` controlling means. The resetting iiieiins prevented troni restoring the con'- trolling ineans to its normal position on the oeciirenife of the first filling presence zitter filling uhse-neo, by the engagement of n inein` her of the Controlling inozins with the looiii stoppage menno. l

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having a series of rack teeth for engagement with the knocleoti' lever and a serios of stop controlling notches, saidnotchos having provision for engagernenthv the controller lug to determine 'the position oi thi` knock-oil lever actuator.

1Q. A loom having, in comhination, fillingr supply controlling' means. filling; detector mechanism. a linoclcof'l' lever, and a misthrcading device comprising, a knockott lever actuator, a controller. and resetter, said controller havingi provision for movement in one directionhy engagement with the knock-oil lever and having provision for movement in the opposite direction by the resetter.

13. A loom having, in conihination. filling supply controlling means` filling detector mechanism, a linocleoti lever, and a misthreading device comprising, a` knock-ott' lover actuator having a eontrollcr lug. :t controller. and a resetter. said `controller l eing provided with a series ot slop controlling notches ot diii'erent depths in which the con troller lugr is adapted to he received either to position the actuator for causing;l loom stoppage or to hold it in imaicraiive position according to whether the predctermined nmnloer of the requisite kinds o if inisthreacls have occurred.

14. A loom having, in combination. filling' supply controlling means, filling detector mechanism including a detector slide. a knock-off lever. a vve'tt hammer. and a niis threading device mounted on the detector slide conniirising. a pivcted lniocli-otl lever actuator. a controller mounted for pi\.'otal and vertical movements. and a resetter positively connected vvith the controller. said actuator and controller having provision whereby the actuator is brought to one position to cause loom stoppage, on the occurrence ot thret` successive vforward movements ot" the detectorslide and is brought to another position to cause loom stoppage. if on the next detecting heat the detector slide remains quiescent.

15. A loom havin".y in combination. fillingr supply Controlling means. filling detector lnechanisnfiA including a detector slide. a knock-oli lever. and a mistlireading device comprising, a knock-ott lever actuator hav ing a controller lngl, a controller, and a resetter, Said controller being provided with delaying` notches adapted to he engage-.tl oy the controller lug when the rack teeth have heen engaged hy the noch-ott' lever.

1G. A loom having, in comhinationi filling supply controlling means, tiiling detector mechanism, a knock-ott' lever, and a in?? threading ydevice comprising., a `knot-haga lever actuator having; a controller lug, a controller. and a resctlcr, sand controller being provided with a of stop delaying notches of dilferent depths adapted to he engaged hy 'the controller lugI and to position thc actuator Jfor loom stoppage when the controller lug is in the deep notches, anti to hohl the. actuator ahove operative iiiosition when the controller lng in the shaliow .Hotel a.

17. A loom having. in cinnlnnation, ling detector mechanism. tillinf snppiy controlling means ano. prising meain'` to slop the loom on rence otl the hopper mi l occurrc" oi one real a being fcorttznoted tioncii to cause icnrrcncc otl .filling heat following l", ngi aiiscip restoring the loo i stoppmf'@` a inist l lily" oe. 'prision the oci norinal position it there is tolling presencey on two successive detecting heats.

19?. A loom having. in combination. iilli'a-i detector mechanism, lilling; supply contrai-- ling means7 ano. a misthroruling device com prising means for causing loom apaga. said loom stoppage means heinz; mns ri itc-tl and arranged to he positioned to cause loom stoppage whenever there is illing presence. on a detector beat following i'illinzgr absence and means for restoring the loom stoppage means Vto normal position 'wher-.ever there. tilling presence on two successive detecting heats following tilling absence.

19. AV loon] ha ving, in combination; tilling' detector mechanism.I filling supply control! ling means and a misthreading device constructed and arranged to cooperate with and to be controlled in its operation hy 'the filling detector mechanism to oc positioned to cause loom stoppage whencve there is illing presence on a detectingr beat illowinglilling absence on thc Infcccding detecting heat.

JONAS NRTHROP.

(its

It is hereby certified that in Letters Patent No. Ll, granted June 18, 1916,

upon the application of Johns Northrop, nf Hopwulv. Mawswhusctts, fr un improvement in Misthreading wiwfs fur Wvlfltcplmlishng Lvomhf errors appear in the printed Speciction requiring correction 2 1@ fullows; Pa gu 7, line 77,

claim 17, first occurrence, fur thv articv tlm" mm1 three; sumo page, lim-Y 93,

claim 18, for the word detect-u1IH rund dftwcing; and that, he Said Letters patent should be read with bes corroctuns therein that the same may conform to th( record of the case in the Patent Office.

Signed and sealed this 25th day o1' Juy, A. D., 1916,

[SEAL] F. W'. H. CLAY.

Acting Commissioner of Patents. 

